It's essential to ask the parents why they are fighting, what they will get out of it, and it's also important for them to know how it's affecting you.
If they use abusive words in a fight, tell them it puts a wrong impression on their children. It's needed to explain to them that quarrels solve nothing.
You can take the help of a psychologist or a counselor to keep your family united and happy.
If it is not very necessary, keep yourself away from the quarrel of parents, stay busy and be happy.
Keep your quarreling parents with you. Take them for outings with you, invite both together in your school or college functions.
If you are too young to speak up or your parents do not listen to you, then you should share your problem with a trusted adult.
Take your parents along with you for a walk. It would be a great experience to share your feelings with them.
If you have grown up watching your parents fight, then stop worrying. Accept the truth for your peace of mind and stay away from stress.